android - 任务 ':app:mergeDebugAssets'的执行失败-数字分类器项目(Tensorflow-lite)

Question

克隆TensorFlow示例GitHub存储库以获取演示应用程序后，我遇到了一些错误。

我将tensorflow用于数字分类器项目，并且在制作数字分类器项目(Tensorflow-lite)时遇到此错误。

感谢您提供任何帮助。

建立gradle:

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'de.undercouch.download'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "org.tensorflow.lite.examples.digitclassifier"
        minSdkVersion 21
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    aaptOptions {
        noCompress "tflite"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

// import DownloadModels task
project.ext.ASSET_DIR = projectDir.toString() + '/src/main/assets'

// Download default models; if you wish to use your own models then
// place them in the "assets" directory and comment out this line.
//apply from: "download_model.gradle"

apply from:'download_model.gradle'

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"

    // Support Libraries
    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'androidx.core:core-ktx:1.1.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'

    // AndroidDraw Library
    implementation 'com.github.divyanshub024:AndroidDraw:v0.1'

    // Task API
    implementation "com.google.android.gms:play-services-tasks:17.0.0"

    // TF Lite
    implementation 'org.tensorflow:tensorflow-lite:0.0.0-nightly'

    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.2.0'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}

我添加了此选项，但没有用:

 defaultConfig {
    multiDexEnabled true
}

Logcat错误:

org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:mergeDebugAssets'.
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:95)
    at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:91)
    at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:57)
    at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:119)
    at org.gradle.api.internal.tasks.execution.ResolvePreviousStateExecuter.execute(ResolvePreviousStateExecuter.java:43)
    at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:93)
    at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:45)
    at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:94)
    at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:56)
    at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:55)
    at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36)
    at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:67)
    at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:52)
    at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:49)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:315)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:305)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:175)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:101)
    at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)
    at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:49)
    at org.gradle.execution.plan.LocalTaskNodeExecutor.execute(LocalTaskNodeExecutor.java:43)
    at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:355)
    at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:343)
    at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:336)
    at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:322)
    at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:134)
    at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:129)
    at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:202)
    at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.executeNextNode(DefaultPlanExecutor.java:193)
    at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:129)
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
    at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
    at com.android.ide.common.resources.AssetItem.computePath(AssetItem.java:58)
    at com.android.ide.common.resources.AssetItem.computePath(AssetItem.java:62)
    at com.android.ide.common.resources.AssetItem.computePath(AssetItem.java:62)
    at com.android.ide.common.resources.AssetItem.computePath(AssetItem.java:62)
    at com.android.ide.common.resources.AssetItem.computePath(AssetItem.java:62)
    at com.android.ide.common.resources.AssetItem.computePath(AssetItem.java:62)
    at com.android.ide.common.resources.AssetItem.computePath(AssetItem.java:62)
    at com.android.ide.common.resources.AssetItem.computePath(AssetItem.java:62)
    at com.android.ide.common.resources.AssetItem.computePath(AssetItem.java:62)
    at com.android.ide.common.resources.AssetItem.computePath(AssetItem.java:62)
    at com.android.ide.common.resources.AssetItem.computePath(AssetItem.java:62)
    at com.android.ide.common.resources.AssetItem.computePath(AssetItem.java:62)
    at com.android.ide.common.resources.AssetItem.computePath(AssetItem.java:62)
    at com.android.ide.common.resources.AssetItem.create(AssetItem.java:47)
    at com.android.ide.common.resources.AssetSet.createFileAndItems(AssetSet.java:49)
    at com.android.ide.common.resources.AssetSet.createFileAndItems(AssetSet.java:27)
    at com.android.ide.common.resources.DataSet.handleNewFile(DataSet.java:543)
    at com.android.ide.common.resources.DataSet.loadFile(DataSet.java:277)
    at com.android.ide.common.resources.DataSet.loadFromFiles(DataSet.java:256)
    at com.android.ide.common.resources.AssetSet.loadFromFiles(AssetSet.java:27)
    at com.android.build.gradle.tasks.MergeSourceSetFolders.doFullTaskAction(MergeSourceSetFolders.java:126)
    at com.android.build.gradle.internal.tasks.IncrementalTask.taskAction(IncrementalTask.java:106)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)
    at org.gradle.api.internal.project.taskfactory.IncrementalTaskAction.doExecute(IncrementalTaskAction.java:47)
    at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:41)
    at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:28)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$2.run(ExecuteActionsTaskExecuter.java:284)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:301)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:293)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:175)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
    at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:273)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:258)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.access$200(ExecuteActionsTaskExecuter.java:67)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$TaskExecution.execute(ExecuteActionsTaskExecuter.java:145)
    at org.gradle.internal.execution.impl.steps.ExecuteStep.execute(ExecuteStep.java:49)
    at org.gradle.internal.execution.impl.steps.CancelExecutionStep.execute(CancelExecutionStep.java:34)
    at org.gradle.internal.execution.impl.steps.TimeoutStep.executeWithoutTimeout(TimeoutStep.java:69)
    at org.gradle.internal.execution.impl.steps.TimeoutStep.execute(TimeoutStep.java:49)
    at org.gradle.internal.execution.impl.steps.CatchExceptionStep.execute(CatchExceptionStep.java:33)
    at org.gradle.internal.execution.impl.steps.CreateOutputsStep.execute(CreateOutputsStep.java:50)
    at org.gradle.internal.execution.impl.steps.SnapshotOutputStep.execute(SnapshotOutputStep.java:43)
    at org.gradle.internal.execution.impl.steps.SnapshotOutputStep.execute(SnapshotOutputStep.java:29)
    at org.gradle.internal.execution.impl.steps.CacheStep.executeWithoutCache(CacheStep.java:134)
    at org.gradle.internal.execution.impl.steps.CacheStep.lambda$execute$3(CacheStep.java:83)
    at java.util.Optional.orElseGet(Optional.java:267)
    at org.gradle.internal.execution.impl.steps.CacheStep.execute(CacheStep.java:82)
    at org.gradle.internal.execution.impl.steps.CacheStep.execute(CacheStep.java:36)
    at org.gradle.internal.execution.impl.steps.PrepareCachingStep.execute(PrepareCachingStep.java:33)
    at org.gradle.internal.execution.impl.steps.StoreSnapshotsStep.execute(StoreSnapshotsStep.java:38)
    at org.gradle.internal.execution.impl.steps.StoreSnapshotsStep.execute(StoreSnapshotsStep.java:23)
    at org.gradle.internal.execution.impl.steps.SkipUpToDateStep.executeBecause(SkipUpToDateStep.java:96)
    at org.gradle.internal.execution.impl.steps.SkipUpToDateStep.lambda$execute$0(SkipUpToDateStep.java:89)
    at java.util.Optional.map(Optional.java:215)
    at org.gradle.internal.execution.impl.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:52)
    at org.gradle.internal.execution.impl.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:36)
    at org.gradle.internal.execution.impl.DefaultWorkExecutor.execute(DefaultWorkExecutor.java:34)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:91)
    ... 35 more

Answer 1

从此地址克隆项目时:

https://github.com/tensorflow/examples/tree/master/lite/examples/digit_classifier/android

不幸的是，它有一个文件作为 Assets ，以便存放到一个文件夹中，这时出现了问题。

我创建了一个 Assets 文件夹并删除了 Assets 文件。

工作正常!